The phrase "catching at straws" often means grasping at unlikely possibilities or options just to avoid a negative situation. Antonyms for this phrase could include being practical, realistic, or logical. Another antonym could be having a clear understanding of the situation, seeing things as they truly are, and making sound decisions based on that understanding. Additionally, an antonym for this phrase could be having a positive outlook and looking for solutions instead of dwelling on the problem. In short, the opposite of "catching at straws" would be approaching a problem with clarity of mind, practicality, and optimism.